You need to determine which degradable material to use as a tissue engineering scaffold for repair of a critical-sized bone defect. (a critical-size defect is one that would not heal unaided). you are planning to seed the scaffold with cells then implant it into the defect. while the cells proliferate and generate bone, the scaffold will degrade and create void space into which the new tissue may grow. what degradation method would you prefer for this scaffold material and why? (hydrolytic vs. enzymatic degradation, bulk vs. surface degradation)

Using a cps-sample of 7,440 individuals, you estimate the following regression: = 20.91 - 2.61 x female where female is a binary variable that takes on the value of 1 for females and is 0 otherwise. the standard error on the coefficient on female is 0.25. the 95% confidence interval for the gender wage gap, or the amount that females earn less, is: a) [-3.10, -2.12] b) [18.30, 23.52] c) [-3.02, -2.20] d) [-1.96, -1.64]

Suppose that the firm cherryblossom has an orchard they are willing to sell today. the net annual returns to the orchard are expected to be $50,000 per year for the next 20 years. at the end of 20 years, it is expected the land will sell for $30,000. calculate the market value of the orchard if the market rate of return on comparable investments is 16%.

Oliver queen buys 100 shares of stock in green arrow archery corporation, a publicly traded company with which he is not affiliated as a director, officer, or employee. he then sells his 100 shares to john diggle. the sec sues oliver because he didn't register the sale of stock to john. who wins? oliver, because the sale falls into the nonissuer exemption oliver, because the sale falls into the private placement exemption the sec, because the transaction is not exempt from registration the sec, because even exempt transactions must be registered with the sec